Components
Library for TMP102 temperature I2C sensor
Dependents: mbed_Shield_LCD_Temperature mbed_Shield_Temperature
Fork of
TMP102
by 
Chris Styles
TMP102.cpp@4:5e5d818d98fa, 2014-04-01 (annotated)
- Committer:
- screamer
- Date:
- Tue Apr 01 13:54:59 2014 +0000
- Revision:
- 4:5e5d818d98fa
- Parent:
- 3:694792b93731
Improved documentation
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| chris | 3:694792b93731 | 1 | /* |
| chris | 3:694792b93731 | 2 | Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com) |
| chris | 3:694792b93731 | 3 | |
| chris | 3:694792b93731 | 4 | Permission is hereby granted, free of charge, to any person obtaining a copy |
| chris | 3:694792b93731 | 5 | of this software and associated documentation files (the "Software"), to deal |
| chris | 3:694792b93731 | 6 | in the Software without restriction, including without limitation the rights |
| chris | 3:694792b93731 | 7 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| chris | 3:694792b93731 | 8 | copies of the Software, and to permit persons to whom the Software is |
| chris | 3:694792b93731 | 9 | furnished to do so, subject to the following conditions: |
| chris | 3:694792b93731 | 10 | |
| chris | 3:694792b93731 | 11 | The above copyright notice and this permission notice shall be included in |
| chris | 3:694792b93731 | 12 | all copies or substantial portions of the Software. |
| chris | 3:694792b93731 | 13 | |
| chris | 3:694792b93731 | 14 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| chris | 3:694792b93731 | 15 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| chris | 3:694792b93731 | 16 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| chris | 3:694792b93731 | 17 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| chris | 3:694792b93731 | 18 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| chris | 3:694792b93731 | 19 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| chris | 3:694792b93731 | 20 | THE SOFTWARE. |
| chris | 3:694792b93731 | 21 | */ |
| chris | 3:694792b93731 | 22 | |
| chris | 3:694792b93731 | 23 | #include "TMP102.h" |
| chris | 3:694792b93731 | 24 | |
| chris | 3:694792b93731 | 25 | #define TEMP_REG_ADDR 0x00 |
| chris | 3:694792b93731 | 26 | |
| chris | 3:694792b93731 | 27 | TMP102::TMP102(PinName sda, PinName scl, int addr) : m_i2c(sda, scl), m_addr(addr) |
| chris | 3:694792b93731 | 28 | { |
| chris | 3:694792b93731 | 29 | |
| chris | 3:694792b93731 | 30 | } |
| chris | 3:694792b93731 | 31 | |
| chris | 3:694792b93731 | 32 | TMP102::~TMP102() |
| chris | 3:694792b93731 | 33 | { |
| chris | 3:694792b93731 | 34 | |
| chris | 3:694792b93731 | 35 | } |
| chris | 3:694792b93731 | 36 | |
| chris | 3:694792b93731 | 37 | float TMP102::read() |
| chris | 3:694792b93731 | 38 | { |
| chris | 3:694792b93731 | 39 | |
| chris | 3:694792b93731 | 40 | const char tempRegAddr = TEMP_REG_ADDR; |
| chris | 3:694792b93731 | 41 | |
| chris | 3:694792b93731 | 42 | m_i2c.write(m_addr, &tempRegAddr, 1); //Pointer to the temperature register |
| chris | 3:694792b93731 | 43 | |
| chris | 3:694792b93731 | 44 | char reg[2] = {0,0}; |
| screamer | 4:5e5d818d98fa | 45 | m_i2c.read(m_addr, reg, 2); //Read |
| chris | 3:694792b93731 | 46 | |
| chris | 3:694792b93731 | 47 | int16_t res = ((int8_t)reg[0] << 4) | ((uint8_t)reg[1] >> 4); |
| chris | 3:694792b93731 | 48 | |
| chris | 3:694792b93731 | 49 | float temp = (float) ((float)res * 0.0625); |
| chris | 3:694792b93731 | 50 | |
| chris | 3:694792b93731 | 51 | return temp; |
| chris | 3:694792b93731 | 52 | } |